12/6/2021 0 Comments Current Sense Shunt ResistorsCurrent sense shunt resistors can be found in two and four-terminal models. The two-terminal shunt resistor is the most basic and easiest to understand. It works the same as any other two-terminal resistance. Bypassing a current through it, a voltage develops across its terminals in proportion to the current. For example, a circuit with a single-terminal shunt-resistor will generate a current that is higher than the one-terminal shunt-resistors. A Hall Effect Shunt resistor is a semiconductor device used to measure the flow of current. It can measure current between -16 V and 80 V. A current sense shunt monitor should be able to detect a wide range of currents and voltages, and the INA195 is one of the best-selling models. The INA195 is a part of the INA19x series of current sense resistors. It requires 2.7 to 18 V to power its internal circuitry. In addition, it has an extra pin for measuring the voltage, which makes it possible to use the sensor when the main power plane is short-circuited to the ground. The use of Current Sense Shunt Resistors is a growing field. Its applications include battery charger ICs, LED driver ICs, and battery gas gauges. Depending on the design, current shunts can monitor the power supply, motor, and battery voltage. Oftentimes, the output of a current shunt IC is connected to an op-amp in a control loop. Alternatively, the output from a shunt IC can be passed through a microcontroller to decide whether the output voltage is too low or too high. This technology is also used in cellphones, welding, and power management. Current sense shunts are critical for measuring the flow of current in an electrical circuit. In some applications, the current shunt resistors have to be power-derated. However, other parameters that affect the accuracy of the current measurement include the thermal EMF and the TCR. It is also important to take into account the TCR in a shunt when measuring a high-voltage circuit. While measuring the voltage across a known resistor may seem easy, there are a few factors to consider. A current sense shunt resistor should be large enough to allow high-resolution readings, increase dynamic range, and minimize signal/noise ratio. In contrast, a small current shunt should be small enough to allow the signal to be read as accurately as possible. So, if you are looking for an AFE for a low-voltage electrical circuit, a smaller one is better. When selecting a current sense shunt resistor, you should keep tolerance in mind. The greater the tolerance, the more accurate the measurement. But, as the resistances of the shunts are small, it is vital to consider the tolerances of the components. A small-to-large shunt resistor should have the same maximum and minimum values as the current-sensing shunt. For more information, check out this related post: https://en.wikipedia.org/wiki/Shunt_(electrical).
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